Effect of somatostatin immunoneutralization on gastric acid and pancreatic enzyme secretion in anesthetized rats
| Autor: | Krisztina Kordás, István Kisfalvi, John H. Walsh, Travis E. Solomon, Helen Wong, Gábor Varga |
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| Rok vydání: | 1997 |
| Předmět: |
Male
medicine.medical_specialty Pancreatic amylase secretion Gastric Acid Pancreatic Juice Physiology (medical) Internal medicine medicine Animals Secretion Anesthesia Amylase Rats Wistar Antibodies Blocking Pancreas Delta cell biology Dose-Response Relationship Drug General Neuroscience Antibodies Monoclonal Rats Endocrinology Somatostatin medicine.anatomical_structure Pancreatic juice Amylases biology.protein Gastric acid hormones hormone substitutes and hormone antagonists |
| Zdroj: | Journal of physiology, Paris. 91(3-5) |
| ISSN: | 0928-4257 |
| Popis: | The involvement of somatostatin in urethane-anesthesia-evoked suppression of gastric acid secretion has been described. The present study has examined the role of endogenous somatostatin in diminished pancreatic enzyme secretion during anesthesia, while monitoring acid secretion concurrently. Rats were anesthetized with either urethane or sodium pentobarbital. An indwelling catheter was placed into the right jugular vein. The esophagus and the pylorus were ligated, and the stomach was perfused with saline. The common bile duct was ligated at the hepatic hilum, and cannulated at the duodenal end of the duct for collecting pure pancreatic juice. Purified somatostatin monoclonal antibody (CURE.S6) or control antibody (keyhole limpet hemacyanin, KLH) was injected iv in increasing doses (0.05; 0.15; 0.5; and 1.5 mg) every 30 min ( n = 6). Gastric acid and pancreatic amylase secretions were measured. The effect of the antibodies on CCK-8-stimulated (0.25–2.50 nmol/kg/h) pancreatic amylase secretion was also tested. During urethane anesthesia somatostatin antibody induced a dose-dependent increase in acid output, while control antibody did not change it. Basal pancreatic amylase secretion was not affected by either somatostatin or by control antibody. Pancreatic secretory responses to high but not to low doses CCK-8 were found to be significantly increased following immunoneutralization of somatostatin. In sodium pentobarbital-anesthetized rats somatostatin antibody stimulated basal acid secretion but did not affect basal pancreatic amylase secretion. Our data indicate that in anesthetized rats endogenous somatostatin mediates suppression of basal gastric acid secretion but not that of basal pancreatic amylase secretion, and this action does not depend on the type of anesthesia. Furthermore, endogenous somatostatin may play a physiological role in modulating stimulated pancreatic enzyme secretion in this species. |
| Databáze: | OpenAIRE |
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